/**
 * IK 中文分词 版本 5.0.1 IK Analyzer release 5.0.1
 * 
 * Licensed to the Apache Software Foundation (ASF) under one or more contributor license
 * agreements. See the NOTICE file distributed with this work for additional information regarding
 * copyright ownership. The ASF licenses this file to You under the Apache License, Version 2.0 (the
 * "License"); you may not use this file except in compliance with the License. You may obtain a
 * copy of the License at
 * 
 * http://www.apache.org/licenses/LICENSE-2.0
 * 
 * Unless required by applicable law or agreed to in writing, software distributed under the License
 * is distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express
 * or implied. See the License for the specific language governing permissions and limitations under
 * the License.
 * 
 * 源代码由林良益(linliangyi2005@gmail.com)提供 版权声明 2012，乌龙茶工作室 provided by Linliangyi and copyright 2012 by
 * Oolong studio
 * 
 */
package org.wltea.analyzer.lucene;

import java.io.Reader;
import org.apache.lucene.analysis.Analyzer;
import org.apache.lucene.analysis.Tokenizer;
import org.apache.lucene.analysis.synonym.SynonymFilterFactory;

/**
 * IK分词器，Lucene Analyzer接口实现 兼容Lucene 5.0版本
 */
public final class IKAnalyzer extends Analyzer {

    private boolean useSmart;

    private final boolean ignoreCase = true;

    public boolean useSmart() {
        return useSmart;
    }

    public void setUseSmart(boolean useSmart) {
        this.useSmart = useSmart;
    }

    /**
     * IK分词器Lucene Analyzer接口实现类
     * 
     * 默认细粒度切分算法
     */
    public IKAnalyzer() {
        this(false);
    }

    /**
     * IK分词器Lucene Analyzer接口实现类
     * 
     * @param useSmart 当为true时，分词器进行智能切分
     */
    public IKAnalyzer(boolean useSmart) {
        super();
        this.useSmart = useSmart;
    }

    /**
     * 重载Analyzer接口，构造分词组件,lucene 4.x
     */

    protected TokenStreamComponents createComponents(String fieldName, final Reader in) {
        Tokenizer _IKTokenizer = new IKTokenizer(in, this.useSmart());
        SynonymFilterFactory factory = IkSynonym.getSynonymFilterFactory();
        return new TokenStreamComponents(_IKTokenizer, factory.create(_IKTokenizer));
    }

    /**
     * 重载Analyzer接口，构造分词组件,lucene 5.x
     * 
     * 
     **/

    @Override
    protected TokenStreamComponents createComponents(String fieldName) {
        Tokenizer _IKTokenizer = new IKTokenizer(this.useSmart());
        SynonymFilterFactory factory = IkSynonym.getSynonymFilterFactory();
        return new TokenStreamComponents(_IKTokenizer, factory.create(_IKTokenizer));
    }



}
